li{
    list-style-type: none;
}
#menu {
    width: 740px;
    margin: 30px auto 0px;
    height: 45px;
    background-color: #424242;
}
#menu li{
    float: left;
    width: 92px;
    line-height:39px;
    text-align: center;
    position:relative;
    border:none;
}
#menu li a {
    font-size:16px; color: #F4F4F4;
    display:block;
    outline:0;
    text-decoration:none; 
}
#menu li:hover a {
    color: #ff6700; /*导航栏文字颜色 */
}
#menu li:hover .dropdown_1column {
    left:0px;
    top:38px;
}
.dropdown_1column{ /* 下拉菜单边框颜色*/
    margin: 0px auto;
    float: left;
    position: absolute;
    left: -999em;
    text-align: left;
    border: 1px solid #424241;
    border-top: none;
    background: #F4F4F4;
    width: 92px;
}
#menu li:hover div a { /* 下拉菜单文字颜色*/
font-size:12px
;color:#333;
}

#menu li:hover div a:hover{color:#ff6700;} /*下拉带单鼠标停留颜色*/

#menu li ul {
list-style:none;padding:10px 5px;
margin:0;
}
#menu li ul li {
font-size:12px;
line-height:26px;
position:relative;
padding:0;margin:0;
float:none;
text-align:left;
width:130px;
}
#menu li ul li:hover {
background:none;
border:none;padding:0;
margin:0;
}
